Concrete-mixing machine



G. JAEGER.

v CONCRETE MIXING MACHINE.

APPLICATION FILED SEPT- 25, 1920.

1,414,4 I Patented May 2, 1922 4 SHEETS-SHEET I- Swumtdz GQM Jaw? Gamm G. IAEGER.

CONCRETE MIXING MACHINE.

APPLICATION FILED SEPT. 25, 1920,

2 2 97. 1.] 2m We? T Mn dw m n. nu u a D 9 Q If Q; JH/QQF Mat/Ms G. IAEGER.

CONCRETE MIXING MACHINE.

APPLICATION FILED SEPT. 25. I920.

Patented May 2, 1922 4 SHEETS-SHEET 3.

Gebhurd/Jaeger G. JAEGER.

CONCRETE MIXING MACHINE.

APPLICATION FILED SEPT25, 1920.

1,414,648. PtentedlI1ay2,1922.

4 SHEETSSHEEI 4,

WW m 4 $444 measured quantity of GE'BHARD JAEGER, 0F COLUMBUS, OHIO.

CONCRETE-MTXING MACHINE.

Specification of Letters Patent.

Patented May 2, 192 2.

Application filed September 25, 1920. Serial No. 412,837.

and useful Improvement in Concrete-Mixing Machines, of which the following is a specification.

The invention. relates as embodied herein more especially to the type of concrete mixing machine in which the mixing drum has a single opening and mounted upon a frame to swing to one side for charging it with the materials to be mixed and to the opposite; side for discharging the mixed matena 8.

The principal object of the invention is to provide means whereby an automatically water is automatically the mixing drum while the latter supplied to from its discharging position to is moving its charging position so as to save tlme an avoid the necessity for special attention to the business of supplying the pro-per quantity of water to the mixing drum. Other objects will appear from the following description.

The invention is embodied in the construction and combinations of parts in the example herein particularly shown and described, the features of novelty being finally claimed.

In the accompanying drawings- Figure 1 is a view in side elevation of the machine showing my invention with some details omitted.

Fig. 2 is a similar view showing the mixing drum on its way to charging position during which movement it receives the water.

Fig. 3 is a similar view showing the charging position of the drum.

Fig. 4 is a detail view with parts in section looking from the discharging side of the machine.

Fig. 5 is a fractional detail illustrating part of the means for actuating the water tank.

In the views 6 designates the frame upon which is supported to oscillate a frame 7 pivotally carrying the mixing drum 8. In such machines the drum is provided with suitable means for rotating it on its pivot for the purpose of performing the mixing operation, but as such means are well understood and do not constitute the resent invention it seem unnecessary to s our of ded With the the worm gear scribe the same in full details. Usually such means typically includes a ring 8 on the drum engaged by a driving member 8", the arrangement being such that the axis of the driving member 8 coincides with the axis of oscillation of the drum.

Secured to one trunnion of the oscillating drum-supporting frame 7 is a large worm gear 9 engaged by a worm 10 on a shaft 11 mounted on the side of the frame 6. The worm shaft 11 has loose on it two bevel gears 12 and 13 engaged by an intermediate driver gear 14. Keyed to the shaft 11 but sliding thereon are clutch members 15 and 16 actuatable by-an oscillatory frame 17 having pins to engage grooves in the clutch members 15 and 16 to operatively connect one or the other of said bevel gears 12 and 13 with the worm shaft 11 and so cause said shaft to rotate. in one direction or the other according to which of said clutches is so connected. machine as shown the intermediate driver 14: during operation rotates constantly in the direction indicated by the arrow. The frame 17 is connected by a link rod 18 with a bent hand lever 19 fulcrumed on pin 19 on the frame 6 for shifting the clutch members as hereinafter described. The hand lever 19 at its lower end is held on its fulcrum pin yieldingly outward by a spring 19 and said lever extends upward across the face of the worm gear 9. The face of adjacent thehand lever is provided with three lugs 20, 21 and 22 arranged to automatically shift the lever into the neutral or unclutched position of the clutches to stop oscillation of the drum in the position to which it may be destined by the manual operation of the lever. Assuming that the normal position is that illustrated in Fig. 1 the stop 20 is shown as having acted to shift the clutches into neutral position and the drum stopped at discharging position. By shifting the lever to the left to engage the clutch 15 the drum is swung as shown in Fig. 2 over to the left or charging position as shown in Fig. 3 at which time the lug 21 strikes the hand lever and throws the clutches into neutral position thereby automatically stopping the movement of the drums and leaving it at the charging position for the supplying of the dry materials. In mixing the concrete after charging it is important that the drum be left stationary, except as to rotation on its axis, with its open end upward for a sufii cient period of time for the purpose, hence after the lever has been moved to the right from the position as shown in Fig. 3 and the drumstarted to the right, the stop 22 upon striking the hand lever shifts the same thereby moving the clutches again to neutral position consequently stopping the motion of the drum to the right and at about position shownby broken lines Fig. 3. This last position is termed the mixing positlon. From the mixing position and after the mixing has been satisfactorily accomplished the hand lever is pulled out a little beyond the stop 22 and again by hand shifted to the right thereby moving the proper clutch into engagement and causing the drum; to continue in motion toward discharging position as in Fig. 1. The worm gear 9 in turning from the discharging position to charging position merely carries lug 22 under the hand lever and without actuating said lever and theclutches, said lug being beveled in the direction of the lever when viewed as at the side shown in Fig. 1 and as indicated at 22 in Fig. 4 so as to wedge under the lever without throwing it sidewise.

Suitably journaled above the path of movement of the feeding and discharging opening of the mixing drum is a water tank or vessel 25 supplied by a pipe 26 extending as a rotatable part 26 to within the vessel where it is provided with a valve contained in a casing 27. The stem 28 of the valve in the casing 27 is provided with a pan float 29 adjustably secured thereto by a set screw so that the amount of water to be admitted to the tank can be regulated. The construction of the valve is such that when the float 29 is raised by the water accumulating in the tank the valve is raised and the water out OH. The water is also held out off when the tank is inverted and emptied. The tank is rotated by means of a sprocket belt 30 running around a sprocket wheel 31 on the tubular shaft of the drum and a sprocket wheel 32 on a shaft 33. On the shaft 33 is loosely journaled a small spur gear 34 meshing with the large gear 9. The small spur gear 34 has upon its outer face a circular ratchet tooth 34 and the shaft 33 has aflixed to it a' frame 35 carrying a pin 36 backed by a spring 37 tending to project the end of the pin into the path of the tooth: 34 The construction and timing of the parts is such that during the oscillation of the mixing drum from its discharging position to its charging position the water tank is given a complete revolution thereby permitting the discharge of the water from that tank into the mixing drum and the restoration of the tank to its upright and normally stationary position. In its upright position the tank is automatically. resupplied with water. When the water tank is being turned to upright position any considerable water in the panfloat 29 flows out so that by the time the tank is in upright position the pan is ready to function as a float to cut off the supply from the feed pipe 26 when the predetermined quantity of 'water has run into the tank. Contact of the revolved stem 28 with a cam plate 28 insures that the valve in 27 be opened to supply water to the vessel. When the drum is oscillated from charging position to the mixing or discharging position the water tank is not actuated because the ratchet tooth 34 is turned in reverse direction.

The forms of the parts can be changed without departing from the gist of the in-' vention as claimed.

What I claim is 1. In a mixing machine, the combination with a mixing drum having an opening for the reception of the materials to be mixed and means for oscillating the same from discharging position to charging position, a water vessel mounted on a fixed axis to swing above the path of the opening of the drum and intermediate the said charging and discharging positions of the opening of the drum and driven means for auto matically turning said water vessel to discharge Water into the mixing drum when the latter is moving from discharging to charging position.

2. In a mixing machine, the combination with a mixing drum having an opening for the reception of the materials to be mixed and means for oscillating the same from discharging position to charging position, a water vessel mounted on a fixed axis to swing above the path of the opening of the drum and intermediate the said charging and discharging positions of the opening of the drum, means for automatically supplying a measured quantity of water to said vessel and driven means for automatically turning said water vessel to discharge water into the mixing drum when the latter is moving from discharging to charging position.

3. In a mixing machine, the combination with a water vessel mounted on a stationary axis, a pivotally mounted mixing drum having an opening for the reception of the materials to be mixed and means for oscillating the same in a path under and beyond each side of said Water vessel, said means comprising a worm wheel, a worm and shaft therefor, a driver, a reversible clutch mechanism for rotating the worm shaft, a hand lever for actuating the clutch mechanism to cause the oscillation of the mixing drum in either direction, lugs on the worm wheel for actuating said hand lever to throw the clutch mechanism into neutral position and thereby automatically limit the oscillation of the mixing drum in either direction, and means actuated by said worm clutch mechanism into neutral position and wheel for rotating said water vessel to disthereby automatically limit the travel of the charge the same when the opening of the mixing drum at each of its three said posimixing vessel is under the water vessel. tions.

4. In a mixing machine, the combination 5. In a concrete mixing machine, in comwith a pivotally mounted mixing drumhavbina'tion, a water supplyingwessel having ing an opening for the reception of the substantially a-fixed axis of rotation, a mixmaterial to be mixed and a Water vessel ing vessel having a single opening for having a fixed axis under which the mixing charging and discharging it, means for osvessel oscillates, of means for oscillating cillating the mixing vessel to move said the mixing vessel into charging, mixing opening from a charging position to a disand discharging position comprising a charging position in a path extending unworm wheel, a worm and worm shaft thereder and beyond the water supplying vessel for, a driver, a reversible clutch mechanism and means operated by the means for operfor rotating the Worm shaft, a hand lever ating the mixing vessel for discharging the for actuating the clutch mechanism to cause water supplying vessel into the mixing oscillation of the mixing drum in either divessel. rection, and three lugs on the Worm wheelfor actuating the hand lever to shift the GEBHARD JAEGER. 

